Multi-directional Proximity Sensor with Integrated Motion Detection
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Solution Overview
Problem
Conventional proximity sensors are limited to detecting objects in a single plane, requiring separate systems for X-Y direction motion sensing, which increases cost and size, and are not capable of multi-directional movement detection.
Innovation Solution
A single proximity sensor system incorporating multiple LEDs, an ASIC chip, and a photo detector, with control logic and comparators to generate unique signal profiles for different movements, allowing for multi-directional movement detection without the need for additional dedicated motion detecting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dedicated X-Y motion detecting device is integrated along with a proximity sensor, then movement detection capability is improved, but device complexity and size increase
Solution Approach 1:
The patent combines the proximity sensing function and motion detection function into a single integrated device. The same light source and photo detector used for proximity detection are also utilized for motion detection by analyzing changes in reflected light intensity over time, eliminating the need for separate motion detection hardware and reducing overall device complexity
Solution Approach 2:
The proximity sensor is designed to perform multiple functions: both proximity detection and motion detection in X-Y directions. By processing the output signal from the photo detector to detect both object presence and motion patterns, the single device achieves multi-functionality without requiring additional dedicated components
2Adaptability or versatility
If a dedicated X-Y motion detecting device is integrated along with a proximity sensor, then movement detection capability is improved, but device size increases
Solution Approach 1:
The patent merges the motion detection functionality into the existing proximity sensor structure, utilizing the same physical components (light source, photo detector, housing) for both proximity sensing and motion detection, thereby avoiding the need for additional space that would be required for separate motion detection devices
3Device complexity
If conventional proximity sensor design is used, then object detection in single plane is achieved, but multi-directional movement detection capability is lost
Solution Approach 1:
The patent introduces dynamic analysis of the output signal to detect motion in multiple directions. By monitoring changes in light intensity over time and analyzing the temporal patterns of reflected light, the system can determine motion direction (X-Y directions) while maintaining the same simple sensor structure, achieving enhanced capability through dynamic processing rather than additional hardware
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables cost-effective and compact multi-directional movement detection, integrating object presence and motion sensing capabilities, reducing the complexity and size of devices while enhancing their functional capabilities.
Implementation Method 1
When an object comes within a predetermined distance of the sensor, the object reflects the light from the light source toward the photo detector
Implementation Method 2
a photo detector to detect light reflected by an object that is within a predetermined proximity of the sensor
Data Source
AI summary
A proximity sensor with multi-directional movement detection is provided. The proximity sensor may include an ASIC chip; at least three light sources configured to emit light in a particular sequence; and a photo detector configured to receive light and generate an output signal. The multi-directional proximity sensor may have a first proximity sensor with at least one side surface and a second proximity sensor connected to the first proximity sensor configured to detect object movement over a plane substantially parallel to the at least one side surface of the first proximity sensor. The multi-directional movement detection proximity sensor may include a PCB, in which more than one proximity sensor may be disposed on the PCB and operatively integrated to detect multi-directional movement.